(02-01-12, 01:44 AM)Grahamm link Wrote: One other thing you might try on a long, straight empty road is to accelerate up to a reasonable speed, then pull in the clutch and block-shift down to neutral and (carefully!) let go of the bars and see if it starts to drift.
After checking tyre pressure and play in the steering head, I suggest doing this as well. However, I think it would be a lot safer to accelerate into a higher gear and leave the bike in gear. Just as a precaution, should the bike start turning sharp.
If there is no play, tyres are well inflated and good, but bike starts leaning on its own, do check for wheel alignment (Cord method before mentioned). Perhaps it could be made OK with minor change of rear wheel alignment (with bolts). In case this doesn't help, check for bent (missaligned) forks, then frame. Forks cane be screwed when putting them on, or just when mounting the front wheel badly. That is not a big problem.
Most things done in a hurry need to be done again - patiently.